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http://hdl.handle.net/20.500.12386/28021
Titolo: | RELICS: Strong-lensing Analysis of the Massive Clusters MACS J0308.9+2645 and PLCK G171.9-40.7 | Autori: | Acebron, Ana Cibirka, Nathália Zitrin, Adi Coe, Dan Agulli, Irene Sharon, Keren Bradač, Maruša Frye, Brenda Livermore, Rachael C. Mahler, Guillaume Salmon, Brett Umetsu, Keiichi Bradley, Larry Andrade-Santos, Felipe Avila, Roberto Carrasco, Daniela Cerny, Catherine Czakon, Nicole G. Dawson, William A. Hoag, Austin T. Huang, Kuang-Han Johnson, Traci L. Jones, Christine Kikuchihara, Shotaro Lam, Daniel LOVISARI, LORENZO Mainali, Ramesh Oesch, Pascal A. Ogaz, Sara Ouchi, Masami Past, Matthew Paterno-Mahler, Rachel Peterson, Avery Ryan, Russell E. Sendra-Server, Irene Stark, Daniel P. Strait, Victoria Toft, Sune Trenti, Michele Vulcani, Benedetta |
Data pubblicazione: | 2018 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 858 | Fascicolo: | 1 | Da pagina:: | 42 | Abstract: | Strong gravitational lensing by galaxy clusters has become a powerful tool for probing the high-redshift universe, magnifying distant and faint background galaxies. Reliable strong-lensing (SL) models are crucial for determining the intrinsic properties of distant, magnified sources and for constructing their luminosity function. We present here the first SL analysis of MACS J0308.9+2645 and PLCK G171.9-40.7, two massive galaxy clusters imaged with the Hubble Space Telescope, in the framework of the Reionization Lensing Cluster Survey (RELICS). We use the light-traces-mass modeling technique to uncover sets of multiply imaged galaxies and constrain the mass distribution of the clusters. Our SL analysis reveals that both clusters have particularly large Einstein radii (θ <SUB> E </SUB> > 30″ for a source redshift of z <SUB> s </SUB> = 2), providing fairly large areas with high magnifications, useful for high-redshift galaxy searches (∼2 arcmin<SUP>2</SUP> with μ > 5 to ∼1 arcmin<SUP>2</SUP> with μ > 10, similar to a typical Hubble Frontier Fields cluster). We also find that MACS J0308.9+2645 hosts a promising, apparently bright (J ∼ 23.2-24.6 AB), multiply imaged high-redshift candidate at z ∼ 6.4. These images are among the brightest high-redshift candidates found in RELICS. Our mass models, including magnification maps, are made publicly available for the community through the Mikulski Archive for Space Telescopes. | URI: | http://hdl.handle.net/20.500.12386/28021 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/aabe29 | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/aabe29 | Bibcode ADS: | 2018ApJ...858...42A | Fulltext: | open |
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